My job has been making me feel this way. It's partly why I'm angry and depressed lately.

Well, the depression hit me randomly, and then the unappreciative behavior from my coworkers just feeds the depression.

Wheneve I feel unappreciated, I find a way to make my coworkers appreciate me. I guess I'm a horrible person, but I don't tolerate people treating me like trash. Basically, I make them desperate for my help in order to get my point across. And if they still don't appreciate me, then I leave the job or find another position within the company.

I'm not saying you should do that. I'm just saying that's what I do